<front>

<front> (front matter) 本文より前，文書の始めにある序文としてあるもの(標題，タイトル，序文， 献辞など)． [4.6 Title Pages 4 Default Text Structure]
モジュール textstructure — Default Text Structure
属性 att.global (@xml:id, @n, @xml:lang, @xml:base, @xml:space) (att.global.rendition (@rend, @style, @rendition)) (att.global.linking (@corresp, @synch, @sameAs, @copyOf, @next, @prev, @exclude, @select)) (att.global.analytic (@ana)) (att.global.facs (@facs)) (att.global.change (@change)) (att.global.responsibility (@cert, @resp)) (att.global.source (@source)) att.declaring (@decls)
上位
textstructure: floatingText text
transcr: facsimile
下位
analysis: interp interpGrp span spanGrp
certainty: certainty precision respons
core: cb divGen ellipsis gap gb head index lb listBibl meeting milestone note noteGrp p pb
drama: castList epilogue performance prologue set
figures: figure notatedMusic
iso-fs: fLib fs fvLib
linking: ab alt altGrp anchor join joinGrp link linkGrp timeline
spoken: incident kinesic pause shift vocal writing
tagdocs: schemaSpec
textcrit: app witDetail
textstructure: argument byline closer dateline div div1 docAuthor docDate docEdition docImprint docTitle epigraph postscript salute signed titlePage titlePart trailer
transcr: addSpan damageSpan delSpan fw listTranspose metamark space substJoin
解説

Because cultural conventions differ as to which elements are grouped as front matter and which as back matter, the content models for the front and back elements are identical.
例
<front>
 <epigraph>
  <quote>Nam Sibyllam quidem Cumis ego ipse oculis meis vidi in ampulla
     pendere, et cum illi pueri dicerent: <q xml:lang="grc">Σίβυλλα τί
       θέλεις</q>; respondebat illa: <q xml:lang="grc">ὰποθανεῖν θέλω.</q>
  </quote>
 </epigraph>
 <div type="dedication">
  <p>For Ezra Pound <q xml:lang="it">il miglior fabbro.</q>
  </p>
 </div>
</front>
例
<front>
 <div type="dedication">
  <p>To our three selves</p>
 </div>
 <div type="preface">
  <head>Author's Note</head>
  <p>All the characters in this book are purely imaginary, and if the
     author has used names that may suggest a reference to living persons
     she has done so inadvertently. ...</p>
 </div>
</front>
例
<front>
 <div type="abstract">
  <div>
   <head> BACKGROUND:</head>
   <p>Food insecurity can put children at greater risk of obesity because
       of altered food choices and nonuniform consumption patterns.</p>
  </div>
  <div>
   <head> OBJECTIVE:</head>
   <p>We examined the association between obesity and both child-level
       food insecurity and personal food insecurity in US children.</p>
  </div>
  <div>
   <head> DESIGN:</head>
   <p>Data from 9,701 participants in the National Health and Nutrition
       Examination Survey, 2001-2010, aged 2 to 11 years were analyzed.
       Child-level food insecurity was assessed with the US Department of
       Agriculture's Food Security Survey Module based on eight
       child-specific questions. Personal food insecurity was assessed with
       five additional questions. Obesity was defined, using physical
       measurements, as body mass index (calculated as kg/m2) greater than
       or equal to the age- and sex-specific 95th percentile of the Centers
       for Disease Control and Prevention growth charts. Logistic
       regressions adjusted for sex, race/ethnic group, poverty level, and
       survey year were conducted to describe associations between obesity
       and food insecurity.</p>
  </div>
  <div>
   <head> RESULTS:</head>
   <p>Obesity was significantly associated with personal food insecurity
       for children aged 6 to 11 years (odds ratio=1.81; 95% CI 1.33 to
       2.48), but not in children aged 2 to 5 years (odds ratio=0.88; 95%
       CI 0.51 to 1.51). Child-level food insecurity was not associated
       with obesity among 2- to 5-year-olds or 6- to 11-year-olds.</p>
  </div>
  <div>
   <head> CONCLUSIONS:</head>
   <p>Personal food insecurity is associated with an increased risk of
       obesity only in children aged 6 to 11 years. Personal
       food-insecurity measures may give different results than aggregate
       food-insecurity measures in children.</p>
  </div>
 </div>
</front>
Content model 
<content>
 <sequence>
  <alternate minOccurs="0"
   maxOccurs="unbounded">
   <classRef key="model.frontPart"/>
   <classRef key="model.pLike"/>
   <classRef key="model.pLike.front"/>
   <classRef key="model.global"/>
  </alternate>
  <sequence minOccurs="0">
   <alternate>
    <sequence>
     <classRef key="model.div1Like"/>
     <alternate minOccurs="0"
      maxOccurs="unbounded">
      <classRef key="model.div1Like"/>
      <classRef key="model.frontPart"/>
      <classRef key="model.global"/>
     </alternate>
    </sequence>
    <sequence>
     <classRef key="model.divLike"/>
     <alternate minOccurs="0"
      maxOccurs="unbounded">
      <classRef key="model.divLike"/>
      <classRef key="model.frontPart"/>
      <classRef key="model.global"/>
     </alternate>
    </sequence>
   </alternate>
   <sequence minOccurs="0">
    <classRef key="model.divBottom"/>
    <alternate minOccurs="0"
     maxOccurs="unbounded">
     <classRef key="model.divBottom"/>
     <classRef key="model.global"/>
    </alternate>
   </sequence>
  </sequence>
 </sequence>
</content>
宣言 
<rng:element name="front">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.global.rendition.attributes"/>
 <rng:ref name="att.global.linking.attributes"/>
 <rng:ref name="att.global.analytic.attributes"/>
 <rng:ref name="att.global.facs.attributes"/>
 <rng:ref name="att.global.change.attributes"/>
 <rng:ref name="att.global.responsibility.attributes"/>
 <rng:ref name="att.global.source.attributes"/>
 <rng:ref name="att.declaring.attributes"/>
 <rng:group>
  <rng:zeroOrMore>
   <rng:choice>
    <rng:ref name="model.frontPart"/>
    <rng:ref name="model.pLike"/>
    <rng:ref name="model.pLike.front"/>
    <rng:ref name="model.global"/>
   </rng:choice>
  </rng:zeroOrMore>
  <rng:optional>
   <rng:group>
    <rng:choice>
     <rng:group>
      <rng:ref name="model.div1Like"/>
      <rng:zeroOrMore>
       <rng:choice>
        <rng:ref name="model.div1Like"/>
        <rng:ref name="model.frontPart"/>
        <rng:ref name="model.global"/>
       </rng:choice>
      </rng:zeroOrMore>
     </rng:group>
     <rng:group>
      <rng:ref name="model.divLike"/>
      <rng:zeroOrMore>
       <rng:choice>
        <rng:ref name="model.divLike"/>
        <rng:ref name="model.frontPart"/>
        <rng:ref name="model.global"/>
       </rng:choice>
      </rng:zeroOrMore>
     </rng:group>
    </rng:choice>
    <rng:optional>
     <rng:group>
      <rng:ref name="model.divBottom"/>
      <rng:zeroOrMore>
       <rng:choice>
        <rng:ref name="model.divBottom"/>
        <rng:ref name="model.global"/>
       </rng:choice>
      </rng:zeroOrMore>
     </rng:group>
    </rng:optional>
   </rng:group>
  </rng:optional>
 </rng:group>
</rng:element>
element front
{
   att.global.attributes,
   att.global.rendition.attributes,
   att.global.linking.attributes,
   att.global.analytic.attributes,
   att.global.facs.attributes,
   att.global.change.attributes,
   att.global.responsibility.attributes,
   att.global.source.attributes,
   att.declaring.attributes,
   (
      ( model.frontPart | model.pLike | model.pLike.front | model.global )*,
      (
         (
            (
               model.div1Like,
               ( model.div1Like | model.frontPart | model.global )*
            )
          | (
               model.divLike,
               ( model.divLike | model.frontPart | model.global )*
            )
         ),
         ( model.divBottom, ( model.divBottom | model.global )* )?
      )?
   )
}